From 11:00PM PDT on Friday, July 1 until 5:00AM PDT on Saturday, July 2, the Shmoop engineering elves will be making tweaks and improvements to the site. That means Shmoop will be unavailable for use during that time. Thanks for your patience!
Edward Teller, who became the most prominent atomic physicist in the U.S. after Oppenheimer expressed doubts about nuclear weapons, and had his security clearance revoked, shown in 1958. U.S. Federal Government photograph. Public domain.